环庚三烯酚酮   、                                                                                      
dimethyl 7-bicyclo<2.2.1>hepta-2,5-diene-2,3-dicarboxylate                                                                                                                                                                                              以
                                                                                         
甲苯                                                                                  为溶剂,
                                                                                                                                                    反应 336.0h,
                                                                                                                以41%的产率得到rac-dimethyl (1R,4S,4aR,5R,9S,9aR)-12-(bis(methylthio)methylene)-5-hydroxy-6-oxo-4,4a,5,6,9,9a-hexahydro-1H-5,9-etheno-1,4-methanobenzo[7]annulene-2,3-dicarboxylate